lib/api.php

   1 <?php
   2 /**
   3  * StatusNet, the distributed open-source microblogging tool
   4  *
   5  * Base API action
   6  *
   7  * PHP version 5
   8  *
   9  * LICENCE: This program is free software: you can redistribute it and/or modify
  10  * it under the terms of the GNU Affero General Public License as published by
  11  * the Free Software Foundation, either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU Affero General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Affero General Public License
  20  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21  *
  22  * @category  API
  23  * @package   StatusNet
  24  * @author    Zach Copley <zach@status.net>
  25  * @copyright 2009 StatusNet, Inc.
  26  * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
  27  * @link      http://status.net/
  28  */
  29
  30 if (!defined('STATUSNET')) {
  31     exit(1);
  32 }
  33
  34 /**
  35  * Contains most of the Twitter-compatible API output functions.
  36  *
  37  * @category API
  38  * @package  StatusNet
  39  * @author   Zach Copley <zach@status.net>
  40  * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
  41  * @link     http://status.net/
  42  */
  43
  44 class ApiAction extends Action
  45 {
  46      var $format   = null;
  47      var $user     = null;
  48      var $page     = null;
  49      var $count    = null;
  50      var $max_id   = null;
  51      var $since_id = null;
  52      var $since    = null;
  53
  54     /**
  55      * Initialization.
  56      *
  57      * @param array $args Web and URL arguments
  58      *
  59      * @return boolean false if user doesn't exist
  60      */
  61
  62     function prepare($args)
  63     {
  64         parent::prepare($args);
  65
  66         $this->format   = $this->arg('format');
  67         $this->page     = (int)$this->arg('page', 1);
  68         $this->count    = (int)$this->arg('count', 20);
  69         $this->max_id   = (int)$this->arg('max_id', 0);
  70         $this->since_id = (int)$this->arg('since_id', 0);
  71         $this->since    = $this->arg('since');
  72
  73         return true;
  74     }
  75
  76     /**
  77      * Handle a request
  78      *
  79      * @param array $args Arguments from $_REQUEST
  80      *
  81      * @return void
  82      */
  83
  84     function handle($args)
  85     {
  86         parent::handle($args);
  87     }
  88
  89     /**
  90      * Overrides XMLOutputter::element to write booleans as strings (true|false).
  91      * See that method's documentation for more info.
  92      *
  93      * @param string $tag     Element type or tagname
  94      * @param array  $attrs   Array of element attributes, as
  95      *                        key-value pairs
  96      * @param string $content string content of the element
  97      *
  98      * @return void
  99      */
 100     function element($tag, $attrs=null, $content=null)
 101     {
 102         if (is_bool($content)) {
 103             $content = ($content ? 'true' : 'false');
 104         }
 105
 106         return parent::element($tag, $attrs, $content);
 107     }
 108
 109     function twitterUserArray($profile, $get_notice=false)
 110     {
 111         $twitter_user = array();
 112
 113         $twitter_user['id'] = intval($profile->id);
 114         $twitter_user['name'] = $profile->getBestName();
 115         $twitter_user['screen_name'] = $profile->nickname;
 116         $twitter_user['location'] = ($profile->location) ? $profile->location : null;
 117         $twitter_user['description'] = ($profile->bio) ? $profile->bio : null;
 118
 119         $avatar = $profile->getAvatar(AVATAR_STREAM_SIZE);
 120         $twitter_user['profile_image_url'] = ($avatar) ? $avatar->displayUrl() :
 121             Avatar::defaultImage(AVATAR_STREAM_SIZE);
 122
 123         $twitter_user['url'] = ($profile->homepage) ? $profile->homepage : null;
 124         $twitter_user['protected'] = false; # not supported by StatusNet yet
 125         $twitter_user['followers_count'] = $profile->subscriberCount();
 126
 127         // To be supported soon...
 128         $twitter_user['profile_background_color'] = '';
 129         $twitter_user['profile_text_color'] = '';
 130         $twitter_user['profile_link_color'] = '';
 131         $twitter_user['profile_sidebar_fill_color'] = '';
 132         $twitter_user['profile_sidebar_border_color'] = '';
 133
 134         $twitter_user['friends_count'] = $profile->subscriptionCount();
 135
 136         $twitter_user['created_at'] = $this->dateTwitter($profile->created);
 137
 138         $twitter_user['favourites_count'] = $profile->faveCount(); // British spelling!
 139
 140         // Need to pull up the user for some of this
 141         $user = User::staticGet($profile->id);
 142
 143         $timezone = 'UTC';
 144
 145         if ($user->timezone) {
 146             $timezone = $user->timezone;
 147         }
 148
 149         $t = new DateTime;
 150         $t->setTimezone(new DateTimeZone($timezone));
 151
 152         $twitter_user['utc_offset'] = $t->format('Z');
 153         $twitter_user['time_zone'] = $timezone;
 154
 155         // To be supported some day, perhaps
 156         $twitter_user['profile_background_image_url'] = '';
 157         $twitter_user['profile_background_tile'] = false;
 158
 159         $twitter_user['statuses_count'] = $profile->noticeCount();
 160
 161         // Is the requesting user following this user?
 162         $twitter_user['following'] = false;
 163         $twitter_user['notifications'] = false;
 164
 165         if (isset($apidata['user'])) {
 166
 167             $twitter_user['following'] = $apidata['user']->isSubscribed($profile);
 168
 169             // Notifications on?
 170             $sub = Subscription::pkeyGet(array('subscriber' =>
 171                 $apidata['user']->id, 'subscribed' => $profile->id));
 172
 173             if ($sub) {
 174                 $twitter_user['notifications'] = ($sub->jabber || $sub->sms);
 175             }
 176         }
 177
 178         if ($get_notice) {
 179             $notice = $profile->getCurrentNotice();
 180             if ($notice) {
 181                 # don't get user!
 182                 $twitter_user['status'] = $this->twitterStatusArray($notice, false);
 183             }
 184         }
 185
 186         return $twitter_user;
 187     }
 188
 189     function twitterStatusArray($notice, $include_user=true)
 190     {
 191         $profile = $notice->getProfile();
 192
 193         $twitter_status = array();
 194         $twitter_status['text'] = $notice->content;
 195         $twitter_status['truncated'] = false; # Not possible on StatusNet
 196         $twitter_status['created_at'] = $this->dateTwitter($notice->created);
 197         $twitter_status['in_reply_to_status_id'] = ($notice->reply_to) ?
 198             intval($notice->reply_to) : null;
 199         $twitter_status['source'] = $this->sourceLink($notice->source);
 200         $twitter_status['id'] = intval($notice->id);
 201
 202         $replier_profile = null;
 203
 204         if ($notice->reply_to) {
 205             $reply = Notice::staticGet(intval($notice->reply_to));
 206             if ($reply) {
 207                 $replier_profile = $reply->getProfile();
 208             }
 209         }
 210
 211         $twitter_status['in_reply_to_user_id'] =
 212             ($replier_profile) ? intval($replier_profile->id) : null;
 213         $twitter_status['in_reply_to_screen_name'] =
 214             ($replier_profile) ? $replier_profile->nickname : null;
 215
 216         if (isset($this->auth_user)) {
 217             $twitter_status['favorited'] = $this->auth_user->hasFave($notice);
 218         } else {
 219             $twitter_status['favorited'] = false;
 220         }
 221
 222         // Enclosures
 223         $attachments = $notice->attachments();
 224
 225         if (!empty($attachments)) {
 226
 227             $twitter_status['attachments'] = array();
 228
 229             foreach ($attachments as $attachment) {
 230                 if ($attachment->isEnclosure()) {
 231                     $enclosure = array();
 232                     $enclosure['url'] = $attachment->url;
 233                     $enclosure['mimetype'] = $attachment->mimetype;
 234                     $enclosure['size'] = $attachment->size;
 235                     $twitter_status['attachments'][] = $enclosure;
 236                 }
 237             }
 238         }
 239
 240         if ($include_user) {
 241             # Don't get notice (recursive!)
 242             $twitter_user = $this->twitterUserArray($profile, false);
 243             $twitter_status['user'] = $twitter_user;
 244         }
 245
 246         return $twitter_status;
 247     }
 248
 249     function twitterGroupArray($group)
 250     {
 251         $twitter_group=array();
 252         $twitter_group['id']=$group->id;
 253         $twitter_group['url']=$group->permalink();
 254         $twitter_group['nickname']=$group->nickname;
 255         $twitter_group['fullname']=$group->fullname;
 256         $twitter_group['homepage_url']=$group->homepage_url;
 257         $twitter_group['original_logo']=$group->original_logo;
 258         $twitter_group['homepage_logo']=$group->homepage_logo;
 259         $twitter_group['stream_logo']=$group->stream_logo;
 260         $twitter_group['mini_logo']=$group->mini_logo;
 261         $twitter_group['homepage']=$group->homepage;
 262         $twitter_group['description']=$group->description;
 263         $twitter_group['location']=$group->location;
 264         $twitter_group['created']=$this->dateTwitter($group->created);
 265         $twitter_group['modified']=$this->dateTwitter($group->modified);
 266         return $twitter_group;
 267     }
 268
 269     function twitterRssGroupArray($group)
 270     {
 271         $entry = array();
 272         $entry['content']=$group->description;
 273         $entry['title']=$group->nickname;
 274         $entry['link']=$group->permalink();
 275         $entry['published']=common_date_iso8601($group->created);
 276         $entry['updated']==common_date_iso8601($group->modified);
 277         $taguribase = common_config('integration', 'groupuri');
 278         $entry['id'] = "group:$groupuribase:$entry[link]";
 279
 280         $entry['description'] = $entry['content'];
 281         $entry['pubDate'] = common_date_rfc2822($group->created);
 282         $entry['guid'] = $entry['link'];
 283
 284         return $entry;
 285     }
 286
 287     function twitterRssEntryArray($notice)
 288     {
 289         $profile = $notice->getProfile();
 290         $entry = array();
 291
 292         // We trim() to avoid extraneous whitespace in the output
 293
 294         $entry['content'] = common_xml_safe_str(trim($notice->rendered));
 295         $entry['title'] = $profile->nickname . ': ' . common_xml_safe_str(trim($notice->content));
 296         $entry['link'] = common_local_url('shownotice', array('notice' => $notice->id));
 297         $entry['published'] = common_date_iso8601($notice->created);
 298
 299         $taguribase = common_config('integration', 'taguri');
 300         $entry['id'] = "tag:$taguribase:$entry[link]";
 301
 302         $entry['updated'] = $entry['published'];
 303         $entry['author'] = $profile->getBestName();
 304
 305         // Enclosures
 306         $attachments = $notice->attachments();
 307         $enclosures = array();
 308
 309         foreach ($attachments as $attachment) {
 310             $enclosure_o=$attachment->getEnclosure();
 311             if ($enclosure_o) {
 312                  $enclosure = array();
 313                  $enclosure['url'] = $enclosure_o->url;
 314                  $enclosure['mimetype'] = $enclosure_o->mimetype;
 315                  $enclosure['size'] = $enclosure_o->size;
 316                  $enclosures[] = $enclosure;
 317             }
 318         }
 319
 320         if (!empty($enclosures)) {
 321             $entry['enclosures'] = $enclosures;
 322         }
 323
 324         // Tags/Categories
 325         $tag = new Notice_tag();
 326         $tag->notice_id = $notice->id;
 327         if ($tag->find()) {
 328             $entry['tags']=array();
 329             while ($tag->fetch()) {
 330                 $entry['tags'][]=$tag->tag;
 331             }
 332         }
 333         $tag->free();
 334
 335         // RSS Item specific
 336         $entry['description'] = $entry['content'];
 337         $entry['pubDate'] = common_date_rfc2822($notice->created);
 338         $entry['guid'] = $entry['link'];
 339
 340         return $entry;
 341     }
 342
 343
 344     function twitterRelationshipArray($source, $target)
 345     {
 346         $relationship = array();
 347
 348         $relationship['source'] =
 349             $this->relationshipDetailsArray($source, $target);
 350         $relationship['target'] =
 351             $this->relationshipDetailsArray($target, $source);
 352
 353         return array('relationship' => $relationship);
 354     }
 355
 356     function relationshipDetailsArray($source, $target)
 357     {
 358         $details = array();
 359
 360         $details['screen_name'] = $source->nickname;
 361         $details['followed_by'] = $target->isSubscribed($source);
 362         $details['following'] = $source->isSubscribed($target);
 363
 364         $notifications = false;
 365
 366         if ($source->isSubscribed($target)) {
 367
 368             $sub = Subscription::pkeyGet(array('subscriber' =>
 369                 $source->id, 'subscribed' => $target->id));
 370
 371             if (!empty($sub)) {
 372                 $notifications = ($sub->jabber || $sub->sms);
 373             }
 374         }
 375
 376         $details['notifications_enabled'] = $notifications;
 377         $details['blocking'] = $source->hasBlocked($target);
 378         $details['id'] = $source->id;
 379
 380         return $details;
 381     }
 382
 383     function showTwitterXmlRelationship($relationship)
 384     {
 385         $this->elementStart('relationship');
 386
 387         foreach($relationship as $element => $value) {
 388             if ($element == 'source' || $element == 'target') {
 389                 $this->elementStart($element);
 390                 $this->showXmlRelationshipDetails($value);
 391                 $this->elementEnd($element);
 392             }
 393         }
 394
 395         $this->elementEnd('relationship');
 396     }
 397
 398     function showXmlRelationshipDetails($details)
 399     {
 400         foreach($details as $element => $value) {
 401             $this->element($element, null, $value);
 402         }
 403     }
 404
 405     function showTwitterXmlStatus($twitter_status)
 406     {
 407         $this->elementStart('status');
 408         foreach($twitter_status as $element => $value) {
 409             switch ($element) {
 410             case 'user':
 411                 $this->showTwitterXmlUser($twitter_status['user']);
 412                 break;
 413             case 'text':
 414                 $this->element($element, null, common_xml_safe_str($value));
 415                 break;
 416             case 'attachments':
 417                 $this->showXmlAttachments($twitter_status['attachments']);
 418                 break;
 419             default:
 420                 $this->element($element, null, $value);
 421             }
 422         }
 423         $this->elementEnd('status');
 424     }
 425
 426     function showTwitterXmlGroup($twitter_group)
 427     {
 428         $this->elementStart('group');
 429         foreach($twitter_group as $element => $value) {
 430             $this->element($element, null, $value);
 431         }
 432         $this->elementEnd('group');
 433     }
 434
 435     function showTwitterXmlUser($twitter_user, $role='user')
 436     {
 437         $this->elementStart($role);
 438         foreach($twitter_user as $element => $value) {
 439             if ($element == 'status') {
 440                 $this->showTwitterXmlStatus($twitter_user['status']);
 441             } else {
 442                 $this->element($element, null, $value);
 443             }
 444         }
 445         $this->elementEnd($role);
 446     }
 447
 448     function showXmlAttachments($attachments) {
 449         if (!empty($attachments)) {
 450             $this->elementStart('attachments', array('type' => 'array'));
 451             foreach ($attachments as $attachment) {
 452                 $attrs = array();
 453                 $attrs['url'] = $attachment['url'];
 454                 $attrs['mimetype'] = $attachment['mimetype'];
 455                 $attrs['size'] = $attachment['size'];
 456                 $this->element('enclosure', $attrs, '');
 457             }
 458             $this->elementEnd('attachments');
 459         }
 460     }
 461
 462     function showTwitterRssItem($entry)
 463     {
 464         $this->elementStart('item');
 465         $this->element('title', null, $entry['title']);
 466         $this->element('description', null, $entry['description']);
 467         $this->element('pubDate', null, $entry['pubDate']);
 468         $this->element('guid', null, $entry['guid']);
 469         $this->element('link', null, $entry['link']);
 470
 471         # RSS only supports 1 enclosure per item
 472         if(array_key_exists('enclosures', $entry) and !empty($entry['enclosures'])){
 473             $enclosure = $entry['enclosures'][0];
 474             $this->element('enclosure', array('url'=>$enclosure['url'],'type'=>$enclosure['mimetype'],'length'=>$enclosure['size']), null);
 475         }
 476
 477         if(array_key_exists('tags', $entry)){
 478             foreach($entry['tags'] as $tag){
 479                 $this->element('category', null,$tag);
 480             }
 481         }
 482
 483         $this->elementEnd('item');
 484     }
 485
 486     function showJsonObjects($objects)
 487     {
 488         print(json_encode($objects));
 489     }
 490
 491     function showSingleXmlStatus($notice)
 492     {
 493         $this->initDocument('xml');
 494         $twitter_status = $this->twitterStatusArray($notice);
 495         $this->showTwitterXmlStatus($twitter_status);
 496         $this->endDocument('xml');
 497     }
 498
 499     function show_single_json_status($notice)
 500     {
 501         $this->initDocument('json');
 502         $status = $this->twitterStatusArray($notice);
 503         $this->showJsonObjects($status);
 504         $this->endDocument('json');
 505     }
 506
 507
 508     function showXmlTimeline($notice)
 509     {
 510
 511         $this->initDocument('xml');
 512         $this->elementStart('statuses', array('type' => 'array'));
 513
 514         if (is_array($notice)) {
 515             foreach ($notice as $n) {
 516                 $twitter_status = $this->twitterStatusArray($n);
 517                 $this->showTwitterXmlStatus($twitter_status);
 518             }
 519         } else {
 520             while ($notice->fetch()) {
 521                 $twitter_status = $this->twitterStatusArray($notice);
 522                 $this->showTwitterXmlStatus($twitter_status);
 523             }
 524         }
 525
 526         $this->elementEnd('statuses');
 527         $this->endDocument('xml');
 528     }
 529
 530     function showRssTimeline($notice, $title, $link, $subtitle, $suplink=null)
 531     {
 532
 533         $this->initDocument('rss');
 534
 535         $this->element('title', null, $title);
 536         $this->element('link', null, $link);
 537         if (!is_null($suplink)) {
 538             // For FriendFeed's SUP protocol
 539             $this->element('link', array('xmlns' => 'http://www.w3.org/2005/Atom',
 540                                          'rel' => 'http://api.friendfeed.com/2008/03#sup',
 541                                          'href' => $suplink,
 542                                          'type' => 'application/json'));
 543         }
 544         $this->element('description', null, $subtitle);
 545         $this->element('language', null, 'en-us');
 546         $this->element('ttl', null, '40');
 547
 548         if (is_array($notice)) {
 549             foreach ($notice as $n) {
 550                 $entry = $this->twitterRssEntryArray($n);
 551                 $this->showTwitterRssItem($entry);
 552             }
 553         } else {
 554             while ($notice->fetch()) {
 555                 $entry = $this->twitterRssEntryArray($notice);
 556                 $this->showTwitterRssItem($entry);
 557             }
 558         }
 559
 560         $this->endTwitterRss();
 561     }
 562
 563     function showAtomTimeline($notice, $title, $id, $link, $subtitle=null, $suplink=null, $selfuri=null)
 564     {
 565
 566         $this->initDocument('atom');
 567
 568         $this->element('title', null, $title);
 569         $this->element('id', null, $id);
 570         $this->element('link', array('href' => $link, 'rel' => 'alternate', 'type' => 'text/html'), null);
 571
 572         if (!is_null($suplink)) {
 573             # For FriendFeed's SUP protocol
 574             $this->element('link', array('rel' => 'http://api.friendfeed.com/2008/03#sup',
 575                                          'href' => $suplink,
 576                                          'type' => 'application/json'));
 577         }
 578
 579         if (!is_null($selfuri)) {
 580             $this->element('link', array('href' => $selfuri,
 581                 'rel' => 'self', 'type' => 'application/atom+xml'), null);
 582         }
 583
 584         $this->element('updated', null, common_date_iso8601('now'));
 585         $this->element('subtitle', null, $subtitle);
 586
 587         if (is_array($notice)) {
 588             foreach ($notice as $n) {
 589                 $this->raw($n->asAtomEntry());
 590             }
 591         } else {
 592             while ($notice->fetch()) {
 593                 $this->raw($notice->asAtomEntry());
 594             }
 595         }
 596
 597         $this->endDocument('atom');
 598
 599     }
 600
 601     function showRssGroups($group, $title, $link, $subtitle)
 602     {
 603
 604         $this->initDocument('rss');
 605
 606         $this->element('title', null, $title);
 607         $this->element('link', null, $link);
 608         $this->element('description', null, $subtitle);
 609         $this->element('language', null, 'en-us');
 610         $this->element('ttl', null, '40');
 611
 612         if (is_array($group)) {
 613             foreach ($group as $g) {
 614                 $twitter_group = $this->twitterRssGroupArray($g);
 615                 $this->showTwitterRssItem($twitter_group);
 616             }
 617         } else {
 618             while ($group->fetch()) {
 619                 $twitter_group = $this->twitterRssGroupArray($group);
 620                 $this->showTwitterRssItem($twitter_group);
 621             }
 622         }
 623
 624         $this->endTwitterRss();
 625     }
 626
 627
 628     function showTwitterAtomEntry($entry)
 629     {
 630         $this->elementStart('entry');
 631         $this->element('title', null, $entry['title']);
 632         $this->element('content', array('type' => 'html'), $entry['content']);
 633         $this->element('id', null, $entry['id']);
 634         $this->element('published', null, $entry['published']);
 635         $this->element('updated', null, $entry['updated']);
 636         $this->element('link', array('type' => 'text/html',
 637                                      'href' => $entry['link'],
 638                                      'rel' => 'alternate'));
 639         $this->element('link', array('type' => $entry['avatar-type'],
 640                                      'href' => $entry['avatar'],
 641                                      'rel' => 'image'));
 642         $this->elementStart('author');
 643
 644         $this->element('name', null, $entry['author-name']);
 645         $this->element('uri', null, $entry['author-uri']);
 646
 647         $this->elementEnd('author');
 648         $this->elementEnd('entry');
 649     }
 650
 651     function showXmlDirectMessage($dm)
 652     {
 653         $this->elementStart('direct_message');
 654         foreach($dm as $element => $value) {
 655             switch ($element) {
 656             case 'sender':
 657             case 'recipient':
 658                 $this->showTwitterXmlUser($value, $element);
 659                 break;
 660             case 'text':
 661                 $this->element($element, null, common_xml_safe_str($value));
 662                 break;
 663             default:
 664                 $this->element($element, null, $value);
 665                 break;
 666             }
 667         }
 668         $this->elementEnd('direct_message');
 669     }
 670
 671     function directMessageArray($message)
 672     {
 673         $dmsg = array();
 674
 675         $from_profile = $message->getFrom();
 676         $to_profile = $message->getTo();
 677
 678         $dmsg['id'] = $message->id;
 679         $dmsg['sender_id'] = $message->from_profile;
 680         $dmsg['text'] = trim($message->content);
 681         $dmsg['recipient_id'] = $message->to_profile;
 682         $dmsg['created_at'] = $this->dateTwitter($message->created);
 683         $dmsg['sender_screen_name'] = $from_profile->nickname;
 684         $dmsg['recipient_screen_name'] = $to_profile->nickname;
 685         $dmsg['sender'] = $this->twitterUserArray($from_profile, false);
 686         $dmsg['recipient'] = $this->twitterUserArray($to_profile, false);
 687
 688         return $dmsg;
 689     }
 690
 691     function rssDirectMessageArray($message)
 692     {
 693         $entry = array();
 694
 695         $from = $message->getFrom();
 696
 697         $entry['title'] = sprintf('Message from %s to %s',
 698             $from->nickname, $message->getTo()->nickname);
 699
 700         $entry['content'] = common_xml_safe_str($message->rendered);
 701         $entry['link'] = common_local_url('showmessage', array('message' => $message->id));
 702         $entry['published'] = common_date_iso8601($message->created);
 703
 704         $taguribase = common_config('integration', 'taguri');
 705
 706         $entry['id'] = "tag:$taguribase:$entry[link]";
 707         $entry['updated'] = $entry['published'];
 708
 709         $entry['author-name'] = $from->getBestName();
 710         $entry['author-uri'] = $from->homepage;
 711
 712         $avatar = $from->getAvatar(AVATAR_STREAM_SIZE);
 713
 714         $entry['avatar']      = (!empty($avatar)) ? $avatar->url : Avatar::defaultImage(AVATAR_STREAM_SIZE);
 715         $entry['avatar-type'] = (!empty($avatar)) ? $avatar->mediatype : 'image/png';
 716
 717         // RSS item specific
 718
 719         $entry['description'] = $entry['content'];
 720         $entry['pubDate'] = common_date_rfc2822($message->created);
 721         $entry['guid'] = $entry['link'];
 722
 723         return $entry;
 724     }
 725
 726     function showSingleXmlDirectMessage($message)
 727     {
 728         $this->initDocument('xml');
 729         $dmsg = $this->directMessageArray($message);
 730         $this->showXmlDirectMessage($dmsg);
 731         $this->endDocument('xml');
 732     }
 733
 734     function showSingleJsonDirectMessage($message)
 735     {
 736         $this->initDocument('json');
 737         $dmsg = $this->directMessageArray($message);
 738         $this->showJsonObjects($dmsg);
 739         $this->endDocument('json');
 740     }
 741
 742     function showAtomGroups($group, $title, $id, $link, $subtitle=null, $selfuri=null)
 743     {
 744
 745         $this->initDocument('atom');
 746
 747         $this->element('title', null, $title);
 748         $this->element('id', null, $id);
 749         $this->element('link', array('href' => $link, 'rel' => 'alternate', 'type' => 'text/html'), null);
 750
 751         if (!is_null($selfuri)) {
 752             $this->element('link', array('href' => $selfuri,
 753                 'rel' => 'self', 'type' => 'application/atom+xml'), null);
 754         }
 755
 756         $this->element('updated', null, common_date_iso8601('now'));
 757         $this->element('subtitle', null, $subtitle);
 758
 759         if (is_array($group)) {
 760             foreach ($group as $g) {
 761                 $this->raw($g->asAtomEntry());
 762             }
 763         } else {
 764             while ($group->fetch()) {
 765                 $this->raw($group->asAtomEntry());
 766             }
 767         }
 768
 769         $this->endDocument('atom');
 770
 771     }
 772
 773     function showJsonTimeline($notice)
 774     {
 775
 776         $this->initDocument('json');
 777
 778         $statuses = array();
 779
 780         if (is_array($notice)) {
 781             foreach ($notice as $n) {
 782                 $twitter_status = $this->twitterStatusArray($n);
 783                 array_push($statuses, $twitter_status);
 784             }
 785         } else {
 786             while ($notice->fetch()) {
 787                 $twitter_status = $this->twitterStatusArray($notice);
 788                 array_push($statuses, $twitter_status);
 789             }
 790         }
 791
 792         $this->showJsonObjects($statuses);
 793
 794         $this->endDocument('json');
 795     }
 796
 797     function showJsonGroups($group)
 798     {
 799
 800         $this->initDocument('json');
 801
 802         $groups = array();
 803
 804         if (is_array($group)) {
 805             foreach ($group as $g) {
 806                 $twitter_group = $this->twitterGroupArray($g);
 807                 array_push($groups, $twitter_group);
 808             }
 809         } else {
 810             while ($group->fetch()) {
 811                 $twitter_group = $this->twitterGroupArray($group);
 812                 array_push($groups, $twitter_group);
 813             }
 814         }
 815
 816         $this->showJsonObjects($groups);
 817
 818         $this->endDocument('json');
 819     }
 820
 821     function showXmlGroups($group)
 822     {
 823
 824         $this->initDocument('xml');
 825         $this->elementStart('groups', array('type' => 'array'));
 826
 827         if (is_array($group)) {
 828             foreach ($group as $g) {
 829                 $twitter_group = $this->twitterGroupArray($g);
 830                 $this->showTwitterXmlGroup($twitter_group);
 831             }
 832         } else {
 833             while ($group->fetch()) {
 834                 $twitter_group = $this->twitterGroupArray($group);
 835                 $this->showTwitterXmlGroup($twitter_group);
 836             }
 837         }
 838
 839         $this->elementEnd('groups');
 840         $this->endDocument('xml');
 841     }
 842
 843     function showTwitterXmlUsers($user)
 844     {
 845
 846         $this->initDocument('xml');
 847         $this->elementStart('users', array('type' => 'array'));
 848
 849         if (is_array($user)) {
 850             foreach ($user as $u) {
 851                 $twitter_user = $this->twitterUserArray($u);
 852                 $this->showTwitterXmlUser($twitter_user);
 853             }
 854         } else {
 855             while ($user->fetch()) {
 856                 $twitter_user = $this->twitterUserArray($user);
 857                 $this->showTwitterXmlUser($twitter_user);
 858             }
 859         }
 860
 861         $this->elementEnd('users');
 862         $this->endDocument('xml');
 863     }
 864
 865     function showJsonUsers($user)
 866     {
 867
 868         $this->initDocument('json');
 869
 870         $users = array();
 871
 872         if (is_array($user)) {
 873             foreach ($user as $u) {
 874                 $twitter_user = $this->twitterUserArray($u);
 875                 array_push($users, $twitter_user);
 876             }
 877         } else {
 878             while ($user->fetch()) {
 879                 $twitter_user = $this->twitterUserArray($user);
 880                 array_push($users, $twitter_user);
 881             }
 882         }
 883
 884         $this->showJsonObjects($users);
 885
 886         $this->endDocument('json');
 887     }
 888
 889     function showSingleJsonGroup($group)
 890     {
 891         $this->initDocument('json');
 892         $twitter_group = $this->twitterGroupArray($group);
 893         $this->showJsonObjects($twitter_group);
 894         $this->endDocument('json');
 895     }
 896
 897     function show_single_xml_group($group)
 898     {
 899         $this->initDocument('xml');
 900         $twitter_group = $this->twitterGroupArray($group);
 901         $this->showTwitterXmlGroup($twitter_group);
 902         $this->endDocument('xml');
 903     }
 904
 905     function dateTwitter($dt)
 906     {
 907         $dateStr = date('d F Y H:i:s', strtotime($dt));
 908         $d = new DateTime($dateStr, new DateTimeZone('UTC'));
 909         $d->setTimezone(new DateTimeZone(common_timezone()));
 910         return $d->format('D M d H:i:s O Y');
 911     }
 912
 913     function initDocument($type='xml')
 914     {
 915         switch ($type) {
 916         case 'xml':
 917             header('Content-Type: application/xml; charset=utf-8');
 918             $this->startXML();
 919             break;
 920         case 'json':
 921             header('Content-Type: application/json; charset=utf-8');
 922
 923             // Check for JSONP callback
 924             $callback = $this->arg('callback');
 925             if ($callback) {
 926                 print $callback . '(';
 927             }
 928             break;
 929         case 'rss':
 930             header("Content-Type: application/rss+xml; charset=utf-8");
 931             $this->initTwitterRss();
 932             break;
 933         case 'atom':
 934             header('Content-Type: application/atom+xml; charset=utf-8');
 935             $this->initTwitterAtom();
 936             break;
 937         default:
 938             $this->clientError(_('Not a supported data format.'));
 939             break;
 940         }
 941
 942         return;
 943     }
 944
 945     function endDocument($type='xml')
 946     {
 947         switch ($type) {
 948         case 'xml':
 949             $this->endXML();
 950             break;
 951         case 'json':
 952
 953             // Check for JSONP callback
 954             $callback = $this->arg('callback');
 955             if ($callback) {
 956                 print ')';
 957             }
 958             break;
 959         case 'rss':
 960             $this->endTwitterRss();
 961             break;
 962         case 'atom':
 963             $this->endTwitterRss();
 964             break;
 965         default:
 966             $this->clientError(_('Not a supported data format.'));
 967             break;
 968         }
 969         return;
 970     }
 971
 972     function clientError($msg, $code = 400, $format = 'xml')
 973     {
 974         $action = $this->trimmed('action');
 975
 976         common_debug("User error '$code' on '$action': $msg", __FILE__);
 977
 978         if (!array_key_exists($code, ClientErrorAction::$status)) {
 979             $code = 400;
 980         }
 981
 982         $status_string = ClientErrorAction::$status[$code];
 983
 984         header('HTTP/1.1 '.$code.' '.$status_string);
 985
 986         if ($format == 'xml') {
 987             $this->initDocument('xml');
 988             $this->elementStart('hash');
 989             $this->element('error', null, $msg);
 990             $this->element('request', null, $_SERVER['REQUEST_URI']);
 991             $this->elementEnd('hash');
 992             $this->endDocument('xml');
 993         } elseif ($format == 'json'){
 994             $this->initDocument('json');
 995             $error_array = array('error' => $msg, 'request' => $_SERVER['REQUEST_URI']);
 996             print(json_encode($error_array));
 997             $this->endDocument('json');
 998         } else {
 999
1000             // If user didn't request a useful format, throw a regular client error
1001             throw new ClientException($msg, $code);
1002         }
1003     }
1004
1005     function serverError($msg, $code = 500, $content_type = 'json')
1006     {
1007         $action = $this->trimmed('action');
1008
1009         common_debug("Server error '$code' on '$action': $msg", __FILE__);
1010
1011         if (!array_key_exists($code, ServerErrorAction::$status)) {
1012             $code = 400;
1013         }
1014
1015         $status_string = ServerErrorAction::$status[$code];
1016
1017         header('HTTP/1.1 '.$code.' '.$status_string);
1018
1019         if ($content_type == 'xml') {
1020             $this->initDocument('xml');
1021             $this->elementStart('hash');
1022             $this->element('error', null, $msg);
1023             $this->element('request', null, $_SERVER['REQUEST_URI']);
1024             $this->elementEnd('hash');
1025             $this->endDocument('xml');
1026         } else {
1027             $this->initDocument('json');
1028             $error_array = array('error' => $msg, 'request' => $_SERVER['REQUEST_URI']);
1029             print(json_encode($error_array));
1030             $this->endDocument('json');
1031         }
1032     }
1033
1034     function initTwitterRss()
1035     {
1036         $this->startXML();
1037         $this->elementStart('rss', array('version' => '2.0', 'xmlns:atom'=>'http://www.w3.org/2005/Atom'));
1038         $this->elementStart('channel');
1039         Event::handle('StartApiRss', array($this));
1040     }
1041
1042     function endTwitterRss()
1043     {
1044         $this->elementEnd('channel');
1045         $this->elementEnd('rss');
1046         $this->endXML();
1047     }
1048
1049     function initTwitterAtom()
1050     {
1051         $this->startXML();
1052         // FIXME: don't hardcode the language here!
1053         $this->elementStart('feed', array('xmlns' => 'http://www.w3.org/2005/Atom',
1054                                           'xml:lang' => 'en-US',
1055                                           'xmlns:thr' => 'http://purl.org/syndication/thread/1.0'));
1056         Event::handle('StartApiAtom', array($this));
1057     }
1058
1059     function endTwitterAtom()
1060     {
1061         $this->elementEnd('feed');
1062         $this->endXML();
1063     }
1064
1065     function showProfile($profile, $content_type='xml', $notice=null, $includeStatuses=true)
1066     {
1067         $profile_array = $this->twitterUserArray($profile, $includeStatuses);
1068         switch ($content_type) {
1069         case 'xml':
1070             $this->showTwitterXmlUser($profile_array);
1071             break;
1072         case 'json':
1073             $this->showJsonObjects($profile_array);
1074             break;
1075         default:
1076             $this->clientError(_('Not a supported data format.'));
1077             return;
1078         }
1079         return;
1080     }
1081
1082     function getTargetUser($id)
1083     {
1084         if (empty($id)) {
1085
1086             // Twitter supports these other ways of passing the user ID
1087             if (is_numeric($this->arg('id'))) {
1088                 return User::staticGet($this->arg('id'));
1089             } else if ($this->arg('id')) {
1090                 $nickname = common_canonical_nickname($this->arg('id'));
1091                 return User::staticGet('nickname', $nickname);
1092             } else if ($this->arg('user_id')) {
1093                 // This is to ensure that a non-numeric user_id still
1094                 // overrides screen_name even if it doesn't get used
1095                 if (is_numeric($this->arg('user_id'))) {
1096                     return User::staticGet('id', $this->arg('user_id'));
1097                 }
1098             } else if ($this->arg('screen_name')) {
1099                 $nickname = common_canonical_nickname($this->arg('screen_name'));
1100                 return User::staticGet('nickname', $nickname);
1101             } else {
1102                 // Fall back to trying the currently authenticated user
1103                 return $this->auth_user;
1104             }
1105
1106         } else if (is_numeric($id)) {
1107             return User::staticGet($id);
1108         } else {
1109             $nickname = common_canonical_nickname($id);
1110             return User::staticGet('nickname', $nickname);
1111         }
1112     }
1113
1114     function getTargetGroup($id)
1115     {
1116         if (empty($id)) {
1117             if (is_numeric($this->arg('id'))) {
1118                 return User_group::staticGet($this->arg('id'));
1119             } else if ($this->arg('id')) {
1120                 $nickname = common_canonical_nickname($this->arg('id'));
1121                 return User_group::staticGet('nickname', $nickname);
1122             } else if ($this->arg('group_id')) {
1123                 // This is to ensure that a non-numeric user_id still
1124                 // overrides screen_name even if it doesn't get used
1125                 if (is_numeric($this->arg('group_id'))) {
1126                     return User_group::staticGet('id', $this->arg('group_id'));
1127                 }
1128             } else if ($this->arg('group_name')) {
1129                 $nickname = common_canonical_nickname($this->arg('group_name'));
1130                 return User_group::staticGet('nickname', $nickname);
1131             }
1132
1133         } else if (is_numeric($id)) {
1134             return User_group::staticGet($id);
1135         } else {
1136             $nickname = common_canonical_nickname($id);
1137             return User_group::staticGet('nickname', $nickname);
1138         }
1139     }
1140
1141     function sourceLink($source)
1142     {
1143         $source_name = _($source);
1144         switch ($source) {
1145         case 'web':
1146         case 'xmpp':
1147         case 'mail':
1148         case 'omb':
1149         case 'api':
1150             break;
1151         default:
1152             $ns = Notice_source::staticGet($source);
1153             if ($ns) {
1154                 $source_name = '<a href="' . $ns->url . '">' . $ns->name . '</a>';
1155             }
1156             break;
1157         }
1158         return $source_name;
1159     }
1160
1161     /**
1162      * Returns query argument or default value if not found. Certain
1163      * parameters used throughout the API are lightly scrubbed and
1164      * bounds checked.  This overrides Action::arg().
1165      *
1166      * @param string $key requested argument
1167      * @param string $def default value to return if $key is not provided
1168      *
1169      * @return var $var
1170      */
1171     function arg($key, $def=null)
1172     {
1173
1174         // XXX: Do even more input validation/scrubbing?
1175
1176         if (array_key_exists($key, $this->args)) {
1177             switch($key) {
1178             case 'page':
1179                 $page = (int)$this->args['page'];
1180                 return ($page < 1) ? 1 : $page;
1181             case 'count':
1182                 $count = (int)$this->args['count'];
1183                 if ($count < 1) {
1184                     return 20;
1185                 } elseif ($count > 200) {
1186                     return 200;
1187                 } else {
1188                     return $count;
1189                 }
1190             case 'since_id':
1191                 $since_id = (int)$this->args['since_id'];
1192                 return ($since_id < 1) ? 0 : $since_id;
1193             case 'max_id':
1194                 $max_id = (int)$this->args['max_id'];
1195                 return ($max_id < 1) ? 0 : $max_id;
1196             case 'since':
1197                 return strtotime($this->args['since']);
1198             default:
1199                 return parent::arg($key, $def);
1200             }
1201         } else {
1202             return $def;
1203         }
1204     }
1205
1206 }